Earnings Per Common Share or Unit - Computation of Basic and Diluted Earnings Per Share Unit (Parenthetical) (Detail) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary Of Computation Of Basic And Diluted Earnings Per Share [Line Items]
Total weighted average potential dilutive shares and units outstanding	27,087	25,943	25,128
Prologis, L.P. [Member]
Summary Of Computation Of Basic And Diluted Earnings Per Share [Line Items]
Total weighted average potentially dilutive Class A Units	8,231	8,446	8,607
Total weighted average potentially dilutive other limited partnership units	375	891	1,403
Total weighted average potentially dilutive equity awards	7,933	8,175	9,183
Total weighted average potential dilutive shares and units outstanding	16,539	17,512	19,193
Total weighted average potential dilutive common limited partnership units	10,548	8,431	5,935